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app.py
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import gradio as gr
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import pandas as pd
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import joblib
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import matplotlib.pyplot as plt
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# Load the data and the trained model
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products = pd.read_csv("products_master.csv")
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model = joblib.load("rf_model.joblib")
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# --- NEW: build short, readable labels for the dropdown ---
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def shorten(name, max_len=55):
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# Use only the first comma-separated chunk (drops "8 HD Display, Wi-Fi, ..." stuff)
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short = name.split(",")[0].strip()
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# Keep color/edition if it appears at the end (e.g. "Tangerine", "Blue", "Pink")
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parts = name.split(",")
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if len(parts) > 1:
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last = parts[-1].split("-")[0].strip()
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# If the last chunk is short and looks like a color/variant, append it
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if 0 < len(last) <= 25 and last.lower() != short.lower().split()[-1]:
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short = f"{short} – {last}"
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if len(short) > max_len:
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short = short[:max_len-1] + "…"
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return short
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# Build (label, value) pairs: label = short, value = full original name
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dropdown_choices = sorted(
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[(shorten(n), n) for n in products["name"].tolist()],
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key=lambda x: x[0]
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)
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# -----------------------------------------------------------
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def make_recommendation(product_name):
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row = products[products["name"] == product_name].iloc[0]
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# Build sentiment chart
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fig, ax = plt.subplots(figsize=(5, 3))
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counts = [row["pct_positive"], row["pct_neutral"], row["pct_negative"]]
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colors = ["#2ecc71", "#95a5a6", "#e74c3c"]
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ax.bar(["Positive", "Neutral", "Negative"], counts, color=colors, edgecolor="black")
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ax.set_ylabel("% of reviews")
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ax.set_title("Review sentiment breakdown")
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ax.set_ylim(0, 1)
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action = row["model_prediction"]
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emoji = {"Raise": "⬆️", "Hold": "➡️", "Drop": "⬇️"}[action]
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summary = f"""
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### {shorten(row["name"], max_len=80)}
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**Brand:** {row["brand"]}
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**Reviews analyzed:** {int(row["n_reviews"]):,}
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**Average rating:** {row["avg_rating"]:.2f} / 5
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**Average sentiment (VADER):** {row["avg_compound"]:.3f}
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---
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### {emoji} Recommendation: **{action} the price**
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| Metric | Current | Recommended |
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|---|---|---|
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| Price | ${row["current_price"]:.2f} | ${row["recommended_price"]:.2f} |
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| Profit per unit | ${row["current_profit_per_unit"]:.2f} | ${row["recommended_profit_per_unit"]:.2f} |
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**Estimated monthly profit change:** **${row["monthly_profit_change"]:,.2f}**
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"""
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return summary, fig
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with gr.Blocks(title="Amazon Electronics Pricing Recommender") as demo:
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gr.Markdown("# 🛒 Amazon Electronics Pricing Recommender")
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gr.Markdown("Pick a product to see its sentiment breakdown and a price recommendation based on a Random Forest model trained on real reviews.")
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product_dropdown = gr.Dropdown(
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choices=dropdown_choices,
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label="Select a product",
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value=dropdown_choices[0][1],
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)
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btn = gr.Button("Get Recommendation", variant="primary")
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with gr.Row():
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output_text = gr.Markdown()
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output_chart = gr.Plot()
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btn.click(make_recommendation, inputs=product_dropdown, outputs=[output_text, output_chart])
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demo.load (make_recommendation, inputs=product_dropdown, outputs=[output_text, output_chart])
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demo.launch()
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